package thread;

import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ThreadPoolDemo {
    public static void main(String[] args) {
        ExecutorService threadPool = Executors.newFixedThreadPool(3);

        for (int i = 0; i < 5; i++) {
           Runnable r =  () -> {
                   try {
                       Thread t = Thread.currentThread();
                       System.out.println(t.getName()+ "正在执行任务");
                       Thread.sleep(5000);
                       System.out.println(t.getName()+ "执行完毕");
                   } catch (InterruptedException e) {
                       e.printStackTrace();
                   }
           };
           threadPool.execute(r);
        }
        //threadPool.shutdown();
        threadPool.shutdownNow();
        System.out.println("线程池关闭");
    }
}
